Peter Krause, Lauren Graham, Monica Potter, Erika Christensen, Mae Whitman and Craig T. Nelson will join creator Jason Katims at the June 4-7 event. Other cast members will be announced at a later date. Parenthood will be celebrating its 10th anniversary in 2020. The ATX Festival will also reunite the Justified writers' room, host a rare screening of the unaied CBS L.A. Confidential pilot and host an Oz retrospective.